Insight into interactions between syntrophic bacteria and archaea in anaerobic digestion amended with conductive materials

Kumar, Vikas; Nabaterega, Resty; Khoei, Shiva; Eskicioğlu, Çiğdem

doi:10.1016/j.rser.2021.110965

Cited by 68 publications

(12 citation statements)

References 172 publications

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Section: Discussionmentioning

confidence: 85%

“…Synergistes bacteria especially use acetate through syntrophic acetate oxidation coupled with hydrogenotrophic methanogens (Ito et al, 2011). This clearly explains the reason for effective VFA conversion in the AD systems amended with CMs (Kumar et al, 2021). Several that CM supplementation has introduced only small in the microbial community composition without changing the dominant microorganisms (Guo et al, 2020;.…”

Section: Effect Of Granular Activated Carbon Addition On Microbial Co...mentioning

confidence: 92%

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Enhanced anaerobic digestion of dairy wastewater in a granular activated carbon amended sequential batch reactor

et al. 2022

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This study investigated the potential of granular activated carbon (GAC) supplementation to enhance anaerobic degradation of dairy wastewater. Two sequential batch reactors (SBRs; 0.8 L working volume), one control and another amended with GAC, were operated at 37°C and 1.5–1.6 m/h upflow velocity for a total of 120 days (four cycles of 30 days each). The methane production at the end of each cycle run increased by about 68%, 503%, 110%, and 125% in the GAC‐amended SBR, compared with the Control SBR. Lipid degradation was faster in the presence of GAC. Conversely, the organic compounds, especially lipids, accumulated in the absence of the conductive material. In addition, a reduction in lag phase duration by 46%–100% was observed at all four cycles in the GAC‐amended SBR. The peak methane yield rate was at least 2 folds higher with GAC addition in all cycles. RNA‐based bacterial analysis revealed enrichment of Synergistes (0.8% to 29.2%) and Geobacter (0.4% to 11.3%) in the GAC‐amended SBR. Methanolinea (85.8%) was the dominant archaea in the biofilm grown on GAC, followed by Methanosaeta (11.3%), at RNA level. Overall, this study revealed that GAC supplementation in anaerobic digesters treating dairy wastewater can promote stable and efficient methane production, accelerate lipid degradation and might promote the activity of electroactive microorganisms.

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Section: Discussionmentioning

confidence: 85%

Section: Effect Of Granular Activated Carbon Addition On Microbial Co...mentioning

confidence: 92%

Enhanced anaerobic digestion of dairy wastewater in a granular activated carbon amended sequential batch reactor

et al. 2022

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“…It is generally accepted that the hydrolysis of complex substrates such as lignocellulosic materials are the rate-limiting step in AD [30]. However, additional factors may result in low growth rates for protonreducing syntrophic bacteria and methanogenic microorganisms in AD [31], especially in continuous feeding reactors where some of the microbes will leave the reactors through the outlet [32]. For example, methanogens are very sensitive to environmental disturbances such as pH, accumulation of fatty acids and ammonia concentration, while the growth rate of proton exchange bacteria is extremely dependent on the partial pressure of hydrogen in the system [32,33].…”

Section: Figurementioning

confidence: 99%

Molecular Microbial Community Analysis as an Analysis Tool for Optimal Biogas Production

Hashemi

Lien

et al. 2021

Microorganisms

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The microbial diversity in anaerobic digestion (AD) is important because it affects process robustness. High-throughput sequencing offers high-resolution data regarding the microbial diversity and robustness of biological systems including AD; however, to understand the dynamics of microbial processes, knowing the microbial diversity is not adequate alone. Advanced meta-omic techniques have been established to determine the activity and interactions among organisms in biological processes like AD. Results of these methods can be used to identify biomarkers for AD states. This can aid a better understanding of system dynamics and be applied to producing comprehensive models for AD. The paper provides valuable knowledge regarding the possibility of integration of molecular methods in AD. Although meta-genomic methods are not suitable for on-line use due to long operating time and high costs, they provide extensive insight into the microbial phylogeny in AD. Meta-proteomics can also be explored in the demonstration projects for failure prediction. However, for these methods to be fully realised in AD, a biomarker database needs to be developed.

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“…magnetite [26,29]. In addition, some Fe-bearing based materials were used such as ferrihydrite and Nano-Zero-Valent-Iron (NZVI).…”

Section: Introductionmentioning

confidence: 99%

Enhanced methane production by granular activated carbon: A review

Xiao

Liu

Kumar

et al. 2022

Fuel

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Insight into interactions between syntrophic bacteria and archaea in anaerobic digestion amended with conductive materials

Cited by 68 publications

References 172 publications

Enhanced anaerobic digestion of dairy wastewater in a granular activated carbon amended sequential batch reactor

Enhanced anaerobic digestion of dairy wastewater in a granular activated carbon amended sequential batch reactor

Molecular Microbial Community Analysis as an Analysis Tool for Optimal Biogas Production

Enhanced methane production by granular activated carbon: A review

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